Ibn Yusuf

Ibn Yusuf (died 1099) was an emir of North Africa under the Almoravids.

Biography
Ibn Yusuf was born to a family of Sunni Muslim Moors, and he became an emir of the Almoravids in North Africa. In 1080, he met with several Moorish emirs and criticized them for their peaceful behavior (insulting their status as scientists and "music-makers" and asking them where their warriors were), calling them "women". Ibn Yusuf ordered them to burn their books as well as telling their scientists to make war machines and for their scientists to invent poisons to use against the Christians. His large army invaded Spain in 1099 and besieged Valencia, which was defended by the independent mercenary El Cid. El Cid was mortally wounded in the repulse of the Almoravid attack, and he had his widow Ximena strap his body onto his horse and send it out to battle. The horse trampled Ibn Yusuf, who was too terrified to fight, and the Moors were forced to flee back to North Africa.